ECE Faculty Candidate Colloquium
Thursday **Special Time and Location** February 26 11:00 - 11:50 AM Kelley 1007 Nicholas Kirsch Ph.D. Candidate Drexel University Resource Allocation Methods and Effects of Antenna Spacing in MIMO Ad hoc networks With ever-increasing demand for wireless communications, spectral efficiency and power management are of great importance. Nodes in a wireless network are constrained by the power available, interference power, and shared communications resources. Multiple-input multiple-output (MIMO) communication systems were developed to take advantage of the lack of correlation between antennas that are separated in space to increase spectral efficiency. To study these communication systems, a multi-node multiple antenna ad hoc network was developed. With this system, the effects of power management and antenna spacing on network capacity can be studied. Our work has shown that MIMO systems can have increased capacity through improved resource allocation. Resource allocation can be accomplished by assigning power to eigenmodes of the MIMO matrix channel that provide the best capacity. In this talk, several resource allocation methods are presented and analyzed through simulations and experimental results with the multi-node multiple antenna testbed. Improved network capacity is also demonstrated through changing of the physical spacing between the antenna elements. The talk will include results from the multiple antenna testbed, which characterize the wireless channel with respect to the antenna array configuration. Because spatial separation and channel response are closely related, we can use this insight to design more efficient MIMO communication networks. Biography: Nicholas J. Kirsch is a Ph.D. candidate at Drexel University in Philadelphia, PA. He obtained his B.S. degree in electrical engineering from the University of Wisconsin - Madison in 2003 and a M.S. degree in electrical engineering and telecommunications from Drexel University in 2006. >From 2001 to 2002, Nicholas worked for W.L. Gore & Associates on fiber optic link modules and long-wavelength lasers. In 2006, he was awarded the Koerner Family Fellowship at Drexel University. His current research interests include MIMO communications, ad hoc networking, adaptive radio systems, and RFID antenna design.
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